2 ¾ parts stone and gravel aggregate
2 ½ parts sand
1 part cement
½ part water
( glued eel /questions/questionsyoudliketoask/post1648081, Sun 10 May 2009, 20:04, archived)

And even after that audition, they still went with a plasticene model on Bob The Builder

( stuj (^(^;;^)^) GO TEAM SPIDERS!(^(^;;^)^), Sun 10 May 2009, 20:10, archived)